Hot isostatically pressed (HIPed) fluorite glass‐ceramic wasteforms for fluoride molten salt wastes

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dc.contributor.authorGregg, DJen_AU
dc.contributor.authorVance, ERen_AU
dc.contributor.authorDayal, Pen_AU
dc.contributor.authorFarzana, Ren_AU
dc.contributor.authorAly, Zen_AU
dc.contributor.authorHolmes, Ren_AU
dc.contributor.authorTriani, Gen_AU
dc.date.accessioned2020-09-02T23:09:57Zen_AU
dc.date.available2020-09-02T23:09:57Zen_AU
dc.date.issued2020-06-07en_AU
dc.date.statistics2020-09-01en_AU
dc.description.abstractMolten pyroprocessing salts can be used to dissolve used nuclear fuel from a reactor allowing recovery of the actinides. Previously, ANSTO have demonstrated hot isostatically pressed (HIPed) sodalite glass‐ceramic wasteforms for eutectic (Li,K)Cl salts containing fission products, but this system cannot be used for the analogous molten alkali fluoride salts (eg, FLiNaK), which have utility in the application of the next generation of nuclear reactors. In this work, a novel glass‐ceramic composite wasteform has been prepared by HIPing, as a candidate for the immobilization of fission product‐bearing FLiNaK salts. The wasteform has been tailored to immobilize the high fluoride content of the waste within fluorite, whereas the waste alkali elements are incorporated in a durable sodium aluminoborosilicate glass, with total waste loadings of ~17‐21 wt% achieved. It was also demonstrated that the speciation of Mo‐ and Sb‐simulated fission products was altered by adding Ti metal due to a controlled redox environment. The resulting candidate wasteform has been studied by X‐ray diffraction and scanning electron microscopy, including the HIP canister‐wasteform interaction zone, and its performance assessed via leaching studies using the PCT and ASTM C1220 leaching protocols. Dr Vance very much enjoyed the challenge of wasteform design for problematic nuclear wastes, for which fission product‐bearing FLiNaK salts are a clear example. His ability to hone in on a wasteform solution with viable waste loadings that meet performance requirements was testament to his nearly 40 years experience in nuclear waste immobilization. The samples discussed in this work represent the last wasteform materials that he prepared. © 1999-2020 John Wiley & Sons, Inc.en_AU
dc.identifier.citationGregg, D. J., Vance, E. R., Dayal, P., Farzana, R., Aly, Z., Holmes, R., & Triani, G. (2020). Hot isostatically pressed (HIPed) fluorite glass-ceramic wasteforms for fluoride molten salt wastes. Journal of the American Ceramic Society, 103(10), 5454-5469. doi:10.1111/jace.17293en_AU
dc.identifier.govdoc9987en_AU
dc.identifier.issn0002-7820en_AU
dc.identifier.issue10en_AU
dc.identifier.journaltitleJournal of the American Ceramic Societyen_AU
dc.identifier.pagination5454-5469en_AU
dc.identifier.urihttps://doi.org/10.1111/jace.17293en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/9759en_AU
dc.identifier.volume103en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons, Inc.en_AU
dc.subjectMolten saltsen_AU
dc.subjectActinidesen_AU
dc.subjectANSTOen_AU
dc.subjectSynthetic rocksen_AU
dc.subjectRadioactive wastesen_AU
dc.subjectCeramicsen_AU
dc.subjectGlassen_AU
dc.subjectMaterialsen_AU
dc.titleHot isostatically pressed (HIPed) fluorite glass‐ceramic wasteforms for fluoride molten salt wastesen_AU
dc.typeJournal Articleen_AU
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